Canonicity

Canon relationship

(Possible) Origin

The origin of this pairing is unknown. Kyle and Butters are usually labeled as the most compassionate of the boys.

In the episode "The Return of the Fellowship Ring to the Two Towers", after Butters watched a pornographic flim which was mistakenly delivered to him instead of a "Lord of the Rings" tape, he is seen dry-humping Kyle after Kyle tells him to play with them like in "Lord of the Rings". Kyle then tells him that he is a freak to which Butters replies, "Let me have the tape.. my movie.. my precious."

In the episode "Quest for Ratings", Butters, dressed in nothing but his underwear, was sleeping with his head on Kyle's lap. When Kyle awoke, he pushed Butters away from him.

In "Cartman Sucks", Kyle was the only one willing to tell Butters how Cartman had been abusing him in his sleep. However, he decided against it when Butters (mimicking Cartman) tells Kyle off. In "Sexual Healing", Kyle and Butters both are diagnosed with sex addiction and spend most of the episode together.